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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_replace('/^(?:-1|/d+)$|^default$/', '', '13.2'));
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Unknown modifier 'd' in /in/49dYG on line 3 NULL
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier 'd' in /in/49dYG on line 3 NULL